Inverted cone-shaped bearing cylinder forming die and integrated forming process method

Abstract

The application discloses a reverse taper force bearing cylinder forming die and a forming method, and the die comprises an upper half die, a lower half die, a lower end frame pressing ring, a lower end frame protection ring, a connecting vertical plate and an upper end frame pressing ring; the upper half die and the lower half die are assembled through positioning taper pins and screws to form a frustoconical die frame body; after an upper end frame and a lower end frame are installed on the die frame body through positioning pins and screws, the upper end frame pressing ring, the lower end frame pressing ring and the lower end frame protection ring are respectively installed outside the upper end frame and the lower end frame to protect the upper end frame and the lower end frame. The force bearing cylinder produced by the method has high precision, good cementing quality, high rigidity and high performance reliability.

Description

TECHNICAL FIELD

[0001] The present application relates to a kind of inverted taper force cylinder assembly process method, belong to composite material processing technology field. BACKGROUND

[0002] Force cylinder is the main force structure of the main load of satellite, is the core of satellite structure assembly, it is connected with the instrument installation plate of plate system structure to become satellite main structure, can directly provide satellite and launch vehicle connection interface, also can provide the reference for satellite structure design, manufacture, assembly, precision measurement, test, transport support and ground support equipment interface. Therefore, force cylinder is the key main force structure that influences satellite platform structure strength, connection stiffness and the performance such as whole satellite dynamic frequency characteristics, the size precision of force cylinder and the quality of cementing are crucial.

[0003] Force cylinder generally adopts honeycomb sandwich structure, mainly includes upper end frame, lower end frame and cylinder body, wherein cylinder body configuration mainly adopts cylindrical, conical, column-cone integrated shape, and cylinder body is glued and assembled into an integral structure with upper and lower end frame using post-bonding method, this technology is relatively mature. However, for conical structure, the above-mentioned technology is limited to solving the positive conical structure with small upper and large lower, the force cylinder with inverted conical structure formed by upper and lower end frame and cylinder body cannot use the above-mentioned scheme to realize product manufacturing. SUMMARY

[0004] The technical problem to be solved by the present application is to overcome the shortcomings of the prior art, provide an inverted taper force cylinder integrated forming process method, the force cylinder produced by the method has high precision, good cementing quality, high stiffness and high reliability.

[0005] The technical solution employed by the present application is: a force cylinder forming die, comprising an upper half die, a lower half die, a lower end frame compression ring, a lower end frame protection ring, a connecting vertical plate and an upper end frame compression ring; the upper half die and the lower half die are assembled into a frustoconical die frame body through positioning cone pins and screws, the upper end frame and the lower end frame are installed on the die frame body using positioning pins and screws, and the upper end frame compression ring, the lower end frame compression ring and the lower end frame protection ring are respectively installed on the outer side of the upper end frame and the lower end frame to protect the upper end frame and the lower end frame.

[0006] Further, the force cylinder forming die further comprises a dumbbell-shaped lifting rod, which is arranged outside the upper half die and the lower half die as a lifting point.

[0007] An inverted taper force cylinder integrated forming process method using the above-mentioned forming die, comprising:

[0008] Performing inverted taper force cylinder trial assembly;

[0009] The outer panel, inner panel, embedded part, process embedded part, upper end frame, and lower end frame of the inverted cone force cylinder are cleaned with a solvent and then subjected to glue joint phosphoric acid anodization treatment, and after anodization, drying treatment is performed; the aluminum honeycomb is cleaned with a solvent;

[0010] The assembly of the upper end frame, lower end frame, and aluminum honeycomb is performed;

[0011] The outer panel assembly is performed: glue film is pasted on the glue joint surface of the outer panel, double-layer glue film is pasted on the areas where the glue joint gaps between the upper end frame, lower end frame, and outer panel exceed the set threshold according to the trial assembly condition, the positions of the outer panels are determined, the outer panels with pasted glue film are respectively placed in the upper half mold and lower half mold and fixed;

[0012] The lower end frame assembly is performed: according to the trial assembly condition, the lower end frame is put into the forming mold half mold from the half mold C type open area, the other half mold is pushed to the two half molds to be closed, after the lower end frame is installed in place, the lower end frame compression ring and lower end frame protection ring are installed to protect the lower end frame;

[0013] The upper end frame assembly is performed: according to the trial assembly condition, the upper end frame is assembled into the force cylinder forming mold along the axial direction, the upper end frame compression ring and the upper end frame and the mold are fastened;

[0014] The outer panel and the outer panel assembly are performed: J-78 glue film is pasted on the glue joint surface of the outer panel and the aluminum honeycomb, the outer panel and the outer panel are placed in the corresponding position, and the outer panel and the outer panel are compressed;

[0015] The whole height honeycomb and the reinforcing area honeycomb are placed in the corresponding position, the whole height honeycomb and the reinforcing area honeycomb are spliced at the splicing position of the whole height honeycomb and the reinforcing area honeycomb, and a plurality of honeycomb cells are compressed, and a foam glue strip is pasted for splicing and is disconnected every interval to serve as an air duct;

[0016] Foaming glue rods are filled around the splicing position of the aluminum honeycomb, and foam glue rods are filled around the end surface of the aluminum honeycomb and the upper end frame and the lower end frame;

[0017] The inner panel and the inner panel assembly are performed: glue film is pasted on the glue joint surface of the inner panel, the inner panel is placed on the aluminum honeycomb;

[0018] The inner panel assembly is performed: glue film is pasted on the glue joint surface of the inner panel, and the inner panel is placed on the aluminum honeycomb;

[0019] The whole mold is encapsulated, and after encapsulation, curing is performed.

[0020] Further, the trial assembly of the inverted cone force cylinder comprises:

[0021] In the half mold state of the force cylinder forming mold, the process embedded part is used to fix the outer panels to the half mold;

[0022] Put the upper half mold and the lower half mold on the platform, and make the large end of the mold adhere to the platform. Put the lower end frame into the molding mold half from the half mold C-shaped open area. Push the other half mold to the two half molds to make them close. Use the positioning cone pin and the positioning screw to install and fasten the upper half mold and the lower half mold in place.

[0023] Put the force cylinder molding mold into a parallel state. Push the upper end frame into the force cylinder molding mold along the axis direction. Assemble the inner reinforcing face plate on one side of the outer face plate, the aluminum honeycomb, the embedded part, the inner reinforcing face plate on one side of the inner face plate, and the inner face plate in sequence.

[0024] Further, the combination of the upper end frame, the lower end frame, and the aluminum honeycomb is made, which includes:

[0025] Coat a layer of J-78 primer in the U-shaped groove of the upper end frame and the lower end frame. Trim the aluminum honeycomb and insert it into the U-shaped groove. Leave a gap between the honeycombs in the circumferential direction as an air passage. Paste a foam tape at the end face of the U-shaped groove at the joint of the upper end frame and the aluminum honeycomb. The foam tape is disconnected at every certain interval as an air passage. The disconnected position of the foam tape is consistent with the reserved position of the honeycomb air passage in the U-shaped groove. Wrap the embedded part assembly and the process embedded part with a foam tape.

[0026] Further, a layer of single-sided adhesive polytetrafluoroethylene glass cloth is adhered between the contact surface of the upper end frame compression ring and the upper end frame.

[0027] Further, a gap is reserved between the outer face plate reinforcing face plate and the upper end frame and the lower end frame, and a gap is reserved between the inner face plate reinforcing face plate and the upper end frame and the lower end frame.

[0028] Further, the whole mold encapsulation includes:

[0029] Place a process equalizing plate on the outer surface of the inner face plate. Fix the process equalizing plate on the force cylinder molding mold with a polyimide tape. Place polytetrafluoroethylene glass cloth, a separation film, and air-permeable felt on one side of the equalizing plate in sequence. Use a sealing tape for whole mold encapsulation.

[0030] Further, the encapsulation is followed by curing, which includes:

[0031] Put it into a hot press tank for full pressure tightness test. The external pressure is 0.05 MPa, and the pressure holding time is not less than 10 min. No vacuum leakage occurs. After curing, the temperature is raised from room temperature at a rate not greater than 2℃ / min. When the temperature rises to 60℃, the external pressure is increased to 0.03MPa-0.05MPa, and the vacuum is stopped. Air is introduced, and the external pressure is further increased to 0.15MPa. The temperature is increased to 90℃, and the pressure is held for 4 hours before the machine is turned off. After the temperature is reduced to below 60℃, the furnace is discharged.

[0032] Furthermore, the method for integrally molding the inverted conical load-bearing cylinder further includes demolding the inverted conical load-bearing cylinder after it exits the furnace.

[0033] During the demolding process, remove the process auxiliary materials, and then remove the lower frame pressure ring, lower frame protection ring, and upper frame pressure ring in sequence. Remove the upper half mold and the lower half mold, and move the upper half mold or the lower half mold symmetrically and parallel on the platform. Then remove the inverted conical load-bearing cylinder.

[0034] The advantages of this invention compared to the prior art are as follows:

[0035] (1) The molding method of the present invention is applicable to the integral molding of inverted conical load-bearing cylinders, and the product has high assembly accuracy, high rigidity and high performance reliability.

[0036] (2) The load-bearing cylinder prepared by the method of the present invention optimizes the connection method between the satellite and the rocket, improves the connection stiffness and dynamic frequency response characteristics of the satellite structure, and significantly increases the stiffness and performance reliability of the satellite platform structure. Attached Figure Description

[0037] Figure 1 This is a schematic diagram of a load-bearing tube structure;

[0038] Figure 2 This is a schematic diagram of the assembly bonding mold used in this invention. Detailed Implementation

[0039] The present invention will be described in conjunction with the accompanying drawings and embodiments.

[0040] like Figure 1 As shown, the inverted conical load-bearing cylinder includes an upper frame 1, a lower frame 3, and a cylinder body 2. The cylinder body 2 includes an outer panel 2-1, an inner panel 2-3, an aluminum honeycomb structure 2-2, an inner reinforcing panel, embedded parts, and process embedded parts. Both the outer panel 2-1 and the inner panel 2-3 are divided into four equal segments in the circumferential direction, meaning the seams between the segments of the outer panel 2-1 and the inner panel 2-3 are aligned. The seams between the outer panel 2-1 and the inner panel 2-3 are reinforced by the inner reinforcing panel, which is made of the same material as the outer panel 2-1 and the inner panel 2-3. It is bonded to the aluminum honeycomb structure 2-2 and the outer panel 2-1 and the inner panel 2-3, respectively. The embedded parts provide installation interfaces for connecting the load-bearing cylinder to other components, and the process embedded parts are used to fix the outer panel 2-1 and the inner panel 2-3. During the assembly and bonding process of this type of load-bearing cylinder, the inverted conical lower frame is installed in parallel in a semi-mold state, and then the inverted conical load-bearing cylinder is integrally formed by mold integration.

[0041] like Figure 2As shown, the force-bearing cylinder forming die mainly comprises an upper half die 4, a lower half die 5, a lower end frame pressing ring 7, a lower end frame protection ring 8, a connecting vertical plate 9, an upper end frame pressing ring 10, a dumbbell-shaped lifting rod 6, and upper and lower end frame positioning pins and positioning screws. The upper half die 4 and the lower half die 5 are assembled by positioning taper pins and screws to form a complete die frame body. After the upper end frame 1 and the lower end frame 3 are installed on the die frame body by positioning pins and screws, the upper end frame 1 and the lower end frame 3 are protected by the upper end frame pressing ring 10, the lower end frame pressing ring 7, and the lower end frame protection ring 8. The dumbbell-shaped lifting rod 6 provides an overall lifting point without affecting the packaging.

[0042] During the integral forming of the force-bearing cylinder, first, the four-leaf outer panel 2-1 is fixed by using process inserts in the force-bearing cylinder assembly and glue joint forming die half die state, then the upper half die 4 and the lower half die 5 are placed on the platform (the large end of the die is attached to the platform), the lower end frame 3 is put into the forming die half die from the C-shaped open area of the half die, then the other half die is slowly pushed to the two half dies to form a die, and after confirmation, the upper half die 4 and the lower half die 5 are installed and fastened in place by using positioning taper pins and positioning screws. The force-bearing cylinder assembly and glue joint forming die is placed in a parallel state, the upper end frame is slowly pushed into the force-bearing cylinder assembly and glue joint forming die along the axis direction, then the inner reinforcing panel (one side of the outer panel 2-1), the aluminum honeycomb, the embedded part, the inner reinforcing panel (one side of the inner panel 2-3), and the inner panel are assembled in sequence. After the glue joint assembly is completed, packaging and curing are performed.

[0043] Embodiment

[0044] In order to make the purpose, technical scheme and advantages of the present application clearer, the force-bearing cylinder will be described in detail below in combination with the embodiment. As shown in the drawings, Figure 1 As shown, the force-bearing cylinder is an aluminum panel / aluminum honeycomb sandwich structure, the cylinder is inverted conical, large at the top and small at the bottom, and the two ends are glued with aluminum end frames. It is composed of a honeycomb sandwich shell, two end frames, and multiple groups of embedded parts. The upper end inner diameter of the force-bearing cylinder is Φ992mm, the lower end inner diameter is Φ525mm, and the height of the force-bearing cylinder is 631mm. The outer panel 2-1 and the inner panel 2-3 are made of aluminum plate LY12CZ GBn167-82 with a thickness of 0.5mm; the honeycomb core 2-2 is a perforated durable aluminum honeycomb with a specification of 0.03x5 and a height of 9.4mm; an upper end frame 1 is glued to the upper end of the cylinder body, and a lower end frame 3 is glued to the lower end of the cylinder body, both made of Class I forged aluminum LD10CS; the outer panel 2-1 and the inner panel 2-3 are glued with aluminum honeycomb core 2-2 using J-78 90℃ curing structural adhesive, in addition, the force-bearing cylinder also includes inner panel inner reinforcing panel, outer panel inner reinforcing panel, embedded part and process embedded part, the materials of the embedded part and the process embedded part are all aluminum alloy, the materials of the inner and outer panel reinforcing panels are the same as those of the outer panel 2-1 and the inner panel 2-3. The structure is relatively simple, and all processing is carried out by conventional mechanical processing methods.

[0045] The inverted-cone-shaped force-bearing cylinder integrated forming process mainly includes the following aspects:

[0046] a. Force-bearing cylinder assembly gluing mold processing: single-sided Teflon glass cloth is pasted on the working surface of the upper half mold 4, the lower half mold 5, and the process pressure plate, and release agent is brushed on the working surface of the mold. All positioning pins and screws on the mold are soaked and treated with release agent.

[0047] b. Panel processing: the inner panel 2-3 and the outer panel 2-1 are split, and an inner reinforcing panel with a width of 50 mm is arranged at the split part of the panel.

[0048] c. Processing of honeycomb core 2-2: the honeycomb core 2-2 is cut to the height of the honeycomb and the reinforcing area honeycomb with the help of the process pressure plate, and 1-2 honeycomb cells are reserved on one side of the honeycomb as the compression amount at the splicing position;

[0049] d. Trial assembly: the outer panel 2-1 is trial assembled in the state of the two half molds of the force-bearing cylinder assembly gluing forming mold, and is fixed with the corresponding process embedded parts. The consistency of the hole positions of the product panel and the force-bearing cylinder assembly gluing forming mold is checked, and whether the splicing joint at the splicing position of the outer panel 2-1 is appropriate is confirmed. The theoretical size of the splicing joint at the split splicing position of the outer panel 2-1 is 1.5 mm-2 mm, and if the size is too large or too small, it needs to be adjusted in time. The lower end frame 3 is trial assembled in the state of the half mold of the force-bearing cylinder assembly gluing forming mold, and the two half molds are placed on the platform (the large end of the mold is attached to the platform). Because the inside of the lower end frame 3 is larger than the outside, it needs to be put into the forming mold half from the C-shaped open area of the half mold, and then the other half mold is slowly pushed to the two half molds. Whether the assembly gap of the lower end frame 3 and the force-bearing cylinder assembly gluing forming mold is appropriate, the consistency of the quadrant line position with the mold and the product quadrant position, and whether the positioning pins and positioning screws can be installed in place are confirmed. The two half molds are connected and installed in place with taper pins, and the upper half mold 4 and the lower half mold 5 are fastened with screws. The upper end frame 1 is trial assembled, and the upper end frame 1 is slowly pushed into the force-bearing cylinder assembly gluing forming mold along the axial direction. The gap between the outer panel 2-1 and the upper end frame 1 and the lower end frame 3 is detected with a feeler gauge, and the measured value is recorded. The outer panel reinforcing panel is trial assembled, and the position of the outer panel 2-1 and the outer panel reinforcing panel with the upper end frame 1 and the lower end frame 3 is checked and confirmed. If there is interference, the related panels need to be repaired in time. The reinforcing panel needs to reserve 1 mm-2 mm gap with the upper end frame 1 and the lower end frame 3. The embedded parts are trial assembled, and the position of the embedded parts and the fit of the embedded parts with the mold are confirmed. The inner panel reinforcing panel and the inner panel 2-3 are trial assembled, and the reinforcing panel needs to reserve 1 mm-2 mm gap with the upper end frame 1 and the lower end frame 3.

[0050] e. Surface treatment of adhesive bonding: After cleaning the aluminum alloy adhesive bonding parts such as aluminum panel, embedded parts, process embedded parts, upper frame 1, and lower frame 3 with solvent, perform adhesive bonding phosphate anodizing treatment, and then perform drying treatment; clean the honeycomb core 2-2 with solvent.

[0051] f. Assembly Fabrication: Apply a layer of J-78 primer to the U-shaped grooves of the upper frame 1 and lower frame 3. Slightly trim the height-matched honeycomb core 2-2 and insert it into the U-shaped groove, ensuring the honeycomb core 2-2 is not compressed as much as possible. Leave gaps between the honeycombs in the circumferential direction as air passages. Attach appropriately wide foam strips to the end face of the U-shaped groove (i.e., the joint between the upper frame and the honeycomb). Break the foam strips every 300mm, leaving 10mm intervals to create air passages. Ensure the break points of the foam strips correspond to the pre-reserved air passage positions within the U-shaped groove. Wrap the embedded components and process embedded parts with the foam strips.

[0052] g. Assembly of outer panel 2-1: Apply a layer of adhesive film to the entire adhesive surface of outer panel 2-1. Based on the trial assembly, apply a double layer of adhesive film to areas with large gaps between the upper frame 1, lower frame 3 and outer panel 2-1. According to the load-bearing cylinder model, determine the positions of the four outer panel 2-1 segments. Place the outer panel 2-1 segments with the adhesive film applied into the upper half mold 4 and lower half mold 5 of the load-bearing cylinder, aligning the holes with the adhesive surface facing upwards. Each outer panel 2-1 segment is fixed with four embedded parts.

[0053] h. Assembly of the lower frame 3: According to the load-bearing cylinder model, confirm that the quadrant markings of the lower frame 3 and the mold meet the product model requirements. Based on the trial assembly state, insert the lower frame 3 into the half-mold along the C-shaped open area of ​​the mold half. Then, slowly move the other half of the mold until the two half-molds are fully aligned. Confirm that the lower frame 3 is assembled in place, especially whether the root fits snugly with the mold. Only after confirming that everything is correct can subsequent operations be carried out. During the assembly process, take care to protect the lower frame 3 from bumps and damage. Use locating pins and locating screws to connect the lower frame 3 to the mold, and use tapered pins and screws to install and fasten the two half-molds. After the lower frame 3 is installed in place, install the lower frame pressure ring 7 and the lower frame protective ring 8 to protect the lower frame 3. The lower frame protective rings 8 are connected with threaded pins, and the lower frame protective rings 8 and the lower frame pressure ring 7 are connected with screws.

[0054] i. Assembly of Upper Frame 1: Following the load-bearing cylinder model, confirm that the quadrant markings of the upper frame 1 and the mold conform to the product model requirements. Based on the trial assembly state, install the upper frame 1 along the axial direction into the load-bearing cylinder assembly adhesive molding mold. Secure the upper frame pressure ring 10, upper frame 1, and mold with screws, ensuring the screws are tightened symmetrically and evenly during the tightening process. A layer of single-sided adhesive PTFE fiberglass cloth must be bonded to the contact surface between the upper frame pressure ring 10 and the upper frame 1.

[0055] g. Assembly of the outer panel reinforcement panel: Apply a layer of J-78 adhesive film to the bonding surface between the reinforcement panel and the honeycomb. Place the inner reinforcement panel of the outer panel according to the product model of the load-bearing cylinder and the model of the outer panel reinforcement panel. Maintain a 1mm-2mm gap between the reinforcement panel and the upper frame 1 and lower frame 3 to prevent panel slippage and interference with the upper frame 1 and lower frame 3 during curing. Confirm that the reinforcement panel and outer panel 2-1 are completely compacted.

[0056] k. Place the full-height honeycomb and reinforced honeycomb areas in the correct positions. Compress 2-3 honeycomb cells at the joint between the full-height and reinforced honeycomb areas, and attach foam tape for splicing, leaving a 10mm gap every 300mm as an air duct. After splicing, trim the honeycomb cells, ensuring that the honeycomb is stable, free of excess material, and that there are no abrupt changes in height between the reinforced and non-reinforced areas.

[0057] 1. Fill the area around the splicing of the honeycomb core 2-2 with expanding foam (for reserving air channels), and fill the area around the end face of the honeycomb core 2-2 that mates with the upper frame 1 and the lower frame 3 with expanding foam (do not place expanding foam at the reserved air channel positions of the upper and lower frames).

[0058] m. Inner Panel Reinforcement Assembly: Apply a layer of adhesive film to the bonding surface between the reinforcement panel and the honeycomb. Place the inner reinforcement panel according to the model of the load-bearing cylinder product and the model of the inner panel reinforcement panel. Maintain a 1mm-2mm gap between the reinforcement panel and the upper frame 1 and lower frame 3 to prevent panel slippage and interference with the upper and lower frames during curing. Confirm that the reinforcement panel and the honeycomb are completely compacted.

[0059] n. Assembly of inner panel 2-3: Apply a layer of adhesive film to the entire adhesive surface of inner panel 2-3, place inner panel 2-3 on the aluminum honeycomb, and align the holes with the embedded parts.

[0060] 1. Place a process equalizing plate on the outer surface of the inner panel 2-3. Fix the process equalizing plate to the mold with polyimide tape. Lay PTFE glass cloth, release film, and breathable felt on one side of the equalizing plate in sequence, and seal the entire mold with sealing strips. After the product is sealed, place it in an autoclave for a full-pressure sealing test. The external pressure is 0.05MPa, and the pressure holding time is not less than 10 minutes. After no vacuum leakage occurs, the product can be cured. Start heating from room temperature at a rate not exceeding 2℃ / min. When the temperature reaches 60℃, apply external pressure to 0.03MPa~0.05MPa, stop the vacuum, and vent to the atmosphere. Then continue to apply external pressure to 0.15MPa, heat to 90℃, hold for 4 hours, and then shut down the machine. Remove the product from the oven when it cools down to below 60℃.

[0061] After the force bearing cylinder is discharged from the furnace, the demoulding is performed. During the demoulding process, the process auxiliary materials are removed first, then the lower end frame pressing ring 8, the lower end frame protection ring 7 and the upper end frame pressing ring 10 are removed in sequence, then the taper pin at the butt joint part of the upper half mould 4 and the lower half mould 5 is removed, the upper half mould 4 or the lower half mould 5 is symmetrically and parallelly moved out on the platform by using the ejection screws at two butt joint parts, and then the product (i.e. the inverted conical force bearing cylinder) is removed.

[0062] The parts of the present application not described in detail belong to the known technology of the person skilled in the art.

Claims

1. A method for integrally molding an inverted conical load-bearing cylinder using a load-bearing cylinder molding die, characterized in that, The application relates to a method for testing the assembly of a reverse-cone load-bearing cylinder. The outer panel (2-1), the inner panel (2-3), embedded parts, process embedded parts, the upper end frame (1) and the lower end frame (3) of the reverse-cone load-bearing cylinder are cleaned with a solvent and then subjected to glue joint phosphoric acid anodization treatment, and after anodization, drying treatment is performed; the aluminum honeycomb (2-2) is cleaned with a solvent; The assembly of the upper end frame (1), the lower end frame (3) and the aluminum honeycomb (2-2) is performed; The outer panel (2-1) assembly is performed: glue film is pasted on the glue joint surface of the outer panel (2-1), double-layer glue film is pasted on the areas where the glue joint gaps between the upper end frame (1), the lower end frame (3) and the outer panel (2-1) exceed the set threshold according to the test assembly condition, the positions of the outer panel (2-1) petals are determined, the outer panel (2-1) with pasted glue film is placed in the upper half mold (4) and the lower half mold (5) respectively and is fixed; The lower end frame (3) assembly is performed: according to the test assembly condition, the lower end frame (3) is put into the forming mold half mold from the half mold C open area, the other half mold is pushed to the two half molds to be closed, after the lower end frame (3) is installed in place, the lower end frame pressing ring (7) and the lower end frame protection ring (8) are installed, and the lower end frame (3) is protected; The upper end frame (1) assembly is performed: according to the test assembly condition, the upper end frame (1) is assembled into the load-bearing cylinder forming mold along the axial direction, the upper end frame pressing ring (10) is fastened with the mold together with the upper end frame (1); The outer panel reinforcing panel assembly is performed: J-78 glue film is pasted on the glue joint surface of the outer panel reinforcing panel and the aluminum honeycomb (2-2), the outer panel reinforcing panel is placed correspondingly, and the outer panel reinforcing panel and the outer panel (2-1) are pressed tightly; The whole-height honeycomb and the reinforcing area honeycomb are placed in the corresponding positions, a plurality of honeycomb cells are compressed at the splicing position of the whole-height honeycomb and the reinforcing area honeycomb, the splicing is realized by pasting foam adhesive strips and being disconnected at every interval with a set interval as an air duct; Foaming glue rods are filled around the splicing position of the aluminum honeycomb (2-2), and foam glue rods are filled around the end surfaces of the aluminum honeycomb (2-2) matched with the upper end frame (1) and the lower end frame (3); The inner panel reinforcing panel assembly is performed: glue film is pasted on the glue joint surface of the inner panel reinforcing panel and the aluminum honeycomb (2-2), the inner panel reinforcing panel is placed correspondingly, and the inner panel reinforcing panel and the aluminum honeycomb (2-2) are pressed tightly; The inner panel (2-3) assembly is performed: glue film is pasted on the glue joint surface of the inner panel (2-3), and the inner panel (2-3) is placed on the aluminum honeycomb (2-2); The whole mold packaging is performed, and curing is performed after packaging; The load-bearing cylinder forming mold comprises an upper half mold (4), a lower half mold (5), a lower end frame pressing ring (7), a lower end frame protection ring (8), a connecting vertical plate (9) and an upper end frame pressing ring (10); The upper half mold (4) and the lower half mold (5) are assembled through positioning taper pins and screws to form a conical mold frame body, the upper end frame (1) and the lower end frame (3) are installed on the mold frame body through positioning pins and screws, and the upper end frame pressing ring (10), the lower end frame pressing ring (7) and the lower end frame protection ring (8) are respectively installed outside the upper end frame (1) and the lower end frame (3) to protect the upper end frame (1) and the lower end frame (3). ​ 2. The method of the integrated forming process of the reverse tapered load cell according to claim 1, wherein, The method comprises the following steps: In the half-mold state of the force cylinder forming mold, the outer panel (2-1) is fixed into the half-mold by using the process embedded part. The upper half-mold (4) and the lower half-mold (5) are placed on the platform, the large end of the mold is attached to the platform, the lower end frame (3) is put into the forming mold half-mold from the half-mold C type open area, and the other half-mold is pushed to the two half-molds to be closed, and the upper half-mold (4) and the lower half-mold (5) are installed and fastened in place by using the positioning cone pin and the positioning screw. The force cylinder forming mold is placed in a parallel state, the upper end frame (1) is pushed into the force cylinder forming mold along the axis direction, and the inner reinforcing panel on one side of the outer panel (2-1), the aluminum honeycomb (2-2), the embedded part, the inner reinforcing panel on one side of the inner panel (2-3) and the inner panel (2-3) are assembled in sequence.

3. The method of manufacturing an inverted cone-shaped load cell according to claim 2, wherein, The method comprises the following steps: A layer of J-78 primer is coated in the U-shaped groove of the upper end frame (1) and the lower end frame (3), the aluminum honeycomb (2-2) is trimmed and inserted into the U-shaped groove, and a gap is left between the honeycombs in the circumferential direction as an air passage; a foam tape is attached to the end face of the U-shaped groove at the joint of the upper end frame (1) and the aluminum honeycomb (2-2), the foam tape is disconnected at a certain interval as an air passage, and the disconnected position of the foam tape is consistent with the reserved position of the honeycomb air passage in the U-shaped groove; and the embedded part assembly and the process embedded part are wrapped with the foam tape.

4. The method of manufacturing an inverted cone-shaped load cell according to claim 3, wherein, A single-sided adhesive polytetrafluoroethylene glass cloth is attached between the contact surface of the upper end frame compression ring (10) and the upper end frame (1).

5. The method of manufacturing an inverted cone-shaped load cell according to claim 4, wherein, A gap is reserved between the outer panel reinforcing panel and the upper end frame (1) and the lower end frame (3), and a gap is reserved between the inner panel reinforcing panel and the upper end frame (1) and the lower end frame (3).

6. The method of the integrated forming process of the inverted tapered load cell according to claim 5, wherein, The method comprises the following steps: A process equalizing plate is placed on the outer surface of the inner panel (2-3), and the process equalizing plate is fixed on the force cylinder forming mold by using a polyimide adhesive tape; a polytetrafluoroethylene glass cloth, a separation film and a breathable felt are sequentially laid on one side of the equalizing plate; and a sealing tape is used for mold sealing.

7. The method of manufacturing an inverted cone-shaped load cell according to claim 6, wherein, After the sealing, curing is performed, which comprises the following steps: The hot press tank is put in for full pressure sealing test, the external pressure is 0.05 MPa, the pressure maintaining time is not less than 10 min, and no vacuum leakage phenomenon occurs; after the temperature is raised from room temperature at a rate not greater than 2 ℃ / min, the temperature is raised to 60 ℃, the external pressure is added to 0.03 MPa~0.05 MPa, the vacuum is stopped, the atmosphere is introduced, the external pressure is continuously added to 0.15 MPa, the temperature is raised to 90 ℃, and the pressure is maintained for 4 hours before the machine is turned off; after the temperature is lowered to below 60 ℃, the furnace is discharged.

8. The method of manufacturing an inverted cone-shaped load cell according to claim 7, wherein, After the inverted conical force cylinder is discharged, demolding is performed. During the demolding process, the process auxiliary materials are removed, the lower end frame compression ring (7), the lower end frame protection ring (8) and the upper end frame compression ring (10) are sequentially removed, the upper half-mold (4) and the lower half-mold (5) are removed, the upper half-mold (4) or the lower half-mold (5) is symmetrically and parallelly moved out on the platform, and then the inverted conical force cylinder is removed.

9. The method of manufacturing an inverted cone-shaped load cell according to claim 7, wherein, The force bearing cylinder forming die further comprises a dumbbell type suspender (6) arranged outside the upper half die (4) and the lower half die (5) as a hoisting point.

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